Method of and apparatus for waxing paper



J. DECKER AND A. C. VAN SLUYS. METHOD 0F AND APPARATUS FOR WAXING PAPER.

APPLICATION FILED AUG.I9, 1920*.

Patented .Tuly T9, 1921..

2 SHEETS-SHEET l.

OOOOOOOOOOOOO J. DECKER AND A. c. VAN sLuYs.

M ETHOD 0F AND APPARATUS FOR WAXING PAPER.

APPLICATION FILED AuG.l9, 1920.

2 SHEETS-SHET 2.

A w@ .r 03%@m JOHN DECKER AND ADOLPH CHARLES VAN SLUYS, OF NASHUA, NEWHAMPSHIRE, ASSIGNORS T0 NASHUA GUMMED & COATED PAPER COMPANY, OF NSHUA.,NEW HAMPSHIRE, A CORPORATION OF MASSACHUSETTS.

METHOD 0F ,AND APPARATUS FOR WAXING PAPER.

Specification of Letters fatent. Paitmhd July 19'? 119210 Applicationfiled August 19, 1920. Serial No. 404,603.

T0 all w71 om t may coa-cern Be it known that we, JOHN DECKER, a citizenof the llnited States, and AnoLrH C. VAN SLUYs, a subject of the Queenof Holland, both residents of Nashua, in the county of Hillsborough andState of New Hampshire, have invented an Improvement inV The inventionwill be bestunderstood by reference to the following description whentaken in connection with the accompanying illustration of one specificembodiment thereof, while its scopel will be more particularly pointedout in the appended claims.

n the drawings:

Figure 1 is a side elevation in partial section showing an apparatusembodying one form of the invention and capable of carrying out one formof the method;

Fig. 2 is an enlarged detail showing a portion of one of the suctionpipes;

Fig. 3 is a cross sectional view taken through one of the suctionpipes.;

Fig. 4 is a side elevation of the support for the suction pipes andtheir connections to the exhaust device. and

- Fig. 5 is a front elevation of the same.

Referring to the drawings and to the illustrated embodiment of theinvention there selected for illustration. the machine therein shown forcoating paper is ot the general type disclosed in prior patent to CarterNo. 1.110,8?. This comprises a frame work 3. at one end of which thereare provided sets ofibearings 7 and 9. for the shaft of a supply roll ofpaper 1l. any one of which sets of bearings may be employed as desired.At the oppositev end of the niachiue the paper is reeled up on a powerdriven winding reel (not herein shown). the paper. which is heredesignated as l. being wound up on the rcel and unwound from the supplyroll l1 at a relatively high"` rate ofhspeed and being subjected to theintermedlate steps of waxing and finishing.

On leaving the supply roll the paper, before being subjected to theheated wax, preferably passes over a system of guiding and tensioningrolls, which are herein shown as embodied in the companion guide rolls13 and 15, journaled on the frame work of the machine and the succeedingguide roll 17. Thence the paper passes into the Wax pan 19 which issupplied with paraiiin kept heated by any suitable means such as a steamjacket, the paper being caused to pass through the melted paraiiin at adepth which is determined by the adjustable guide roll 21. The latter issupported at opposite sides of the machine upon vertical, adjustableguides 23, each capable of vertical ad# justment through adjustingscrews and a system of beveled gears 25 controlled by the hand wheel 27,so that the depth of immersion and the length of paper immersed may beadjustably controlled.

As the paper passes through the melted paraffin it becomes saturatedtherewith and then passes upward over the guide roll 2 9 and thencebetween the squeeze rolls 31 and 33, which latter act to press out andremove the surplus melted wax. These .squeeze rolls may beef anysuitable construction, such as that shown in the aforesaid prior patentNo. 1,140,873, provided with any suitable surface or jacket-covering andbeing preferably -hollow and steam heated. The upper roll is carried inbearings 35 vertically adjustable by means of the feed screw 37 and handwheel 39 so that the pressure between the rolls may be varied. J

The paper having had the surplus wax removed next passes to thepolishing rolls 41, 43 and 45. these rolls being also preferably'heated,as by providing for the ad- .mission of steam to or through them in anysuitable manner, and presenting a smooth heated polishing surface to thepaper. Preferably` though not necessarily, the roll Ll1 is of steel androlls 13 and 45 of brass. all rolls being positively driven and therolls 41. 43 and 45 being driven in the oppositel direction to thetravel of the paper. rolls i3 and 45 are also carried in adjustablebearings so that the pressure thereof against the paper web may bevaried. The heated The' polishing rolls 43 and 45 pressing against j therapidly moving paper and being driven in thel opposite direction to thetravel thereof impart a smooth, even, glossy finish to the wax.

In order to preserve the finish imparted by the finishing rolls, the waxshould be set and hardened as quickly as possible after leavingtheburnishing rolls. In the illustrated form of the' invention, thepaper web on leaving the lower burnishing roll 45 is plunged into awater bath contained within the water tank47, the paper being guided inits travel through the tank by the power driven submerged rolls 49 and51. Any suitable means are provided for driving the rolls 49-51 at therequired rate of speed as well y as the squeeze rolls and remainingguide rolls, but the details of the driving mechanism form no essentialpart of the present invention. V A supply of cold water is maintained inthe tank by any desired means and the paper web may be given an)7required path of travel through the tank by an appropriatearrangement ofthe guide rolls therein. f

When the paper leaves the tank it is provided-with a hardened finishedwax coating, but before being wound up on the winding reel, the surpluswatermust be removed, and this should be done as quickly as possibleafter leaving the bath. In the illustrated embodiment of the invention,the water, instead of being blown away from the surface of the paper bythe force of an air blast, is

- removed more effectively by one or more suction pipes, represented at53 and inFig. l, bearing against opposite faces ofthe paper web. Asherein shown, each suction pipe comprises a horizontally arranged fixedsection suitably supported in fixed relation to the machine (the detailsof the support not being 'shown in Fig. l) and bearing against the faceof the paper web, the contacting walls of the pipe being preferably'smooth or polished. One or both ends of the pipe section is connectedwith a suction pipe 57 extending to suitable air-exhaustion apparatusadapted to maintain a suction and carry away and dispose of the surplus'moisture which is drawn into the pipe.

Each pipe is provided with suitably shaped suction orifices, which areherein shown as consisting of three rows of small spaced orifices 59, 6land 63, the row 61 approximating the line of contact with the paper, therow 59 being just below the point of contact and the row 63 just above.Each pipe section may be and preferably is so adjusted with relation tothe paper web that it presses slightly against it and tends to -defiectit somewhat from a Istraight path of travel. As the paper passes rapidlyover the surface of the suction pipe (see Fig. 3) the surplus moistureis carried with it between the converging walls of the pipe and thepaperand the pipe tends to remove this moisture by a mechanical wipingaction, the water thus delivered to the pipe being withdrawn through thelower row of suction openings or ldropping from the pipe back into thetank. Any surplus water which passes'the lower row of openings tends tobe removed through the suction orifices of the upper rows 6l and 63.lVater on the opposite side of the paper web is similarly removed by theaction of the suction pipe bearing against the mechanical wiping actionof the pipe itself, the effect of the latter increasing with an increasein speed.

The same suction pipes may be made 'available for different widths ofpaper by use of an iniperforate sleeve 65 at each end of the pipe. Thissleeve is adjustable by means of the set screw 67 to different positionson the pipe so that the suction orifices extending beyond the outsidelimits of the paper may be closed by the sleeve.

' If desired, additional mechanical devices may be used for removing theexcess moisture before the paper rea-ches the suction' device, and wehaver herein shown for that purpose in Fig` l the mechanical wipingdevices 69 and 71, which engage opposite sides of the paper web and tendto remove the excess water from the paper which is carried up from thetank. These wiping devices may consist of fixed, straight edged, smoothfaced strips extending transversely across the paper web and in contacttherewith, be-

ing preferably located and positioned so as to have somewhat an acuteangle with relation to the approaching paper.

The effectiveness of the water relnoval and increased speed ofproduction may also be assisted by the provision of some means foragitating the paper as it leaves the tank, as

by vibrating or shaking the same. To this end we have shown(diagrammatically in Fig. l) applied to opposite sides of the paper andimmediately below the wipers 69 and 71 vibrating devices 73 and 75consisting of smooth transverse rods bearing against the face of thepaper and controlled by electric vibrating motors 77 and 7.9', energizedthrough an electric circuit 81, which are adapted to impart to thevibrator rods 73 and 75 a vibration of low am litude but highperiodicity. The effect o these vibrating devices is to agitate thepaper as it leaves the tank, assisting in freeing from it moisturetending to cling to it but without any tendencyto damage or injure thefinish of the paper.

One method of supporting and connecting the suction pipes is illustratedin Figs. 4 and 5, where the mechanical wipers 69 and 7l and thevibrating devices 73' and 7 5 are omitted,'but an additional pair ofsuction pipes 81 and 83 are utilized to render more effective theremoval of the water. In the illustrated form of tle invention eachsuction pipe has its opposite ends connected to a suction box orseparator 85, thev pipe communicating lwith the interior thereof, onesuction box only being shown in Figs. 4 and 5. The suction pipe isrigidly iixed to the support 87 fastened to the ceiling or an overheadpart of the machine frame. The upper end of the suction box is connectedto theI suction pipe 57 which in turnis conf nected to the exhaust fan89 driven from any suitable source of power, but serving to create asuction within,v the suction box andv each of the pipes communicatingtherewith. The lower end of the suction box is drained by the drain pipe91 which carries the water drained from 4the paper back into the tank47.

l/Vhile for purposes of illustration we have herein shown and describedone specific embodiment of the invention, it is to be understood thatthe same is not limited to the details of construction herein shown orto the relative form or arrangement of parts or to the specificapplication thereof, but that extensive deviations may be made therefromwithout departing from the spirit of the invention.

Claims.

1. The method of making wax paper which comprises first coatin the samewith heated wax, then finishing the surface, then setting the wax bysubjecting it tothe action of a water bath and then removing the waterby suction.

2. The method of making wax paper which comprises causing the paper totravel in the direction of its' length through a bath of heated wax,then through a water bath and then into mechanical contact with asuction device.

3. The method` of /making wax paper which comprises first coating thesame withI heated wax, thensetting the wax by a water bath and removingthe water by a combined wiping and suction action.

4. The method of making wax paper which vcomprises first coating thesame with heated wax, thenv subjecting it to the action of a waterbath,vibrating the paper to remove surplus water and removing additionalmoisture by suction. v

5. The method of making l wax paper heated wax and then subjecting it toa` water bath, withdrawing it therefrom and removing water by suction.

7. The method of making wax paper which comprises r'st coating the samewith heated Wax, then subjecting it to the action of a water bath andthen to the action of a vibrating device.

8. 1n amachine for making wax paper the combination with paper guiding,feeding means, of means for applying heated wax thereto, means forsubjecting it during travel to the action of a cooling bath and asuction member for removing moisture.

9. ln a machine for making wax paper, the combination with paperguiding, .feeding means, of means for applying heated wax thereto, meansfor subjectin it during travel to the action of a cooling bath, and asuction member with which the paper has mechanical Contact during itstravel after leaving the bath. i

10. In a machine for making wax pa er, the combination with paperguiding, fee ing means, of means for applying heated wax thereto, meansfor subjecting it durin travel to the action of a cooling bath, an meansfor removing moisture from the paper after leaving the bath, the samecomprising devices contacting with opposite sides of the paper, andmeans 'for withdrawing the moisture by suction.

11. ln a machine formaking wax paper, the combination with paperguiding, feeding means, of means for applying heated wax thereto, meansfor subjecting it durin travel to the action of a cooling bath, an meansfor removing moisture Jfrom the paper after leaving the bath, the samecomprising hollow suction members extending transversely the paper weband contacting with opposite sides thereof and provided with suctionoriiices for withdrawing the moisture. 12. ln a machine for making waxpaper, the combination with paper guiding, feeding means, of meansforapplying heated wax thereto, means for subjecting 1t durin travel tothe action of a cooling bath, and means for removing moisture from thepaper comprising suction members operatively related to opposite sidesof the paper web.

13. 1n a machine for making wax paper,

,the combination with paper guiding, feedmeans for removing moisturefrom the paper web comprising hollow suc-tion members extendingtransversely the paper web and bearing against opposite sides thereof,said members being provided with a series of suction orifices.

14. In a machine for making Wax paper,

y the combination with paper guiding, feeding travel to the action of acooling bath, and means for removing moisture from the paper web, thesame comprising means for vibrating the Web after leaving the bath, andpneumatic means for removing the surplus moisture.

16. In a machine formaking wax paper, the combination with paperguiding, feeding means, of means for applying heated wax thereto, meansfor subjecting 1t during travel to the action of a cooling bath, andAmeans for removing the moisture from a paper web,'the same comprisingmeans for vibrating the sheet 0r web after it vleaves the bath and Wipindevices operatively related toopposite si es of the web.

In testimony names to this specification.

JOHN DECKER.

ADoLnH CHARLES VAN sLuYs'.

whereof we have signed our

